Murphy Bilge Level Switch System

The BLSK1 gives you all items and fittings necessary to install in your bilge. Or, you can have only the parts you want and you provide brackets, tubing and mounting hardware.
Using the proven "air cell" actuating system, all moving parts and switching are remote from bilge liquids and are thus not affected by corrosion, rust, etc. All wetted parts are non-corrosive materials.
As bilge level rises a column of air is captured in the MAC1 Air Volume Cell. The rising bilge level compresses the column of air creating pressure against the large diaphragm in the BLS1 Bilge Level Switch and the switch trips. The switch set point is adjustable. The switch resets as the bilge is pumped out. Air cell recharges itself during normal operation.